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There are 42 twenty-one-letter words containing IEN

absorption␣coefficientalienation␣of␣affectionantienvironmentalists anti-environmentalistsastronomical␣transientaustausch␣coefficientsballistic␣coefficientsBasset␣Artésien␣Normandcoefficient␣of␣frictionconscientious␣objectorcysteinyl␣leukotrienesdibenzocyclooctadieneelasticity␣coefficientenvironmental␣sciencesEuler's␣totient␣functionfair-weather␣friendshipfamilies␣of␣orientationgirlfriend␣experiencesheptadecatrienoic␣acidintelligence␣quotientslearned␣from␣experienceleathern␣conveniencieslienophrenic␣ligamentsmacro-level␣orientationmarriage␣of␣conveniencemethylcyclopentadienemicro-level␣orientationoctadecatrienoic␣acidsoverconscientiousnesspartition␣coefficientspassionate␣friendshipsphilosophies␣of␣sciencepressure␣gradient␣forceprismatic␣coefficientsprisoners␣of␣consciencerole-oriented␣languagesscience␣by␣press␣releasescientific␣calculatorsscientific␣materialismscientific␣methodologyscientifico-historicalthienobenzodiazepines

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